Process for manufacturing road warning device for divided driveway
US5173099A · kind A · utility
Inventor
Key dates
| Filing date | May 29, 1991 |
| Grant date | Dec 22, 1992 |
| Priority date | — |
| Expiry date | May 29, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B2215/40
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present invention pertains to a process for manufacturing a road warning device for a divided driveway, expecially a process for manufacturing a warning device in different colors, in order to match the traffic signs, in such a way that one first presses a melting pulp of potash-glass to form a main body, then high pressure spray a tinfoil metal powder on the spherical surface of the warning device, trim the circumferences of the uncooled reflecting spheroid, remove the excess metal alloy powder, and finally spray a metal-oxide or metal-halide (e.g. silver oxide, plumbous oxide or gold sodium chloride etc.) either on the entire spherical or semispherical surface of the reflecting spheroid, in order to show different colors on the reflecting spheroid. According to the preferred embodiment of the invention, the main body of the warning device is in white color and the reflecting spheroid exposed on the ground can be manufactured in different colors by means of spraying diverse metal compounds on it in order to match the traffic signs as well as to intensify its condensing and reflection effects by means of the metal powder sprayed on the external surfaces of the main body of the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.